opreport error

Dear ALL,
i am facing following problem while testing oprofile for mpcore architecture on linux-2.6.23 kernle with oprofile-0.9.4 userland tool.
The error description is given below.
i am able start oprofile successfully. but analysing the profiledata with opreport tool
is giving the following error.
-bash-3.2# opreport -d
opreport error: /var/lib/oprofile/samples/current/{root}/lib/sonyld.so/{dep}/{root}/lib/sonyld.so/CPU_CYCLES.100000.0.all.all.all: Invalid argument
any help is greatly appreciated.
Thanks in advance,
regards,
koteswararao.